MaxGekk opened a new pull request #26031: [SPARK-29362][SQL] Move timestamp expressions and tests to separate files URL: https://github.com/apache/spark/pull/26031 ### What changes were proposed in this pull request? In the PR, I propose refactoring of date and timestamp expressions by: - Moving all timestamp expressions from `datetimeExpressions.scala` to `timestampExpressions.scala` - Renaming `datetimeExpressions.scala` to `dateExpressions.scala` - Moving all timestamp expressions tests from `DateExpressionsSuite.scala` to `TimestampExpressionsSuite.scala`. - Moving all timestamp functions tests to from `DateFunctionsSuite.scala` to `TimestampFunctionsSuite.scala`. ### Why are the changes needed? The `datetimeExpressions.scala` file has been becoming large. Its size is more than 2000 lines, at the moment. Also it contains 2 kind of expressions - date expressions and timestamp expressions. To make easier navigation and maintainability of date-time expressions, it would be nice to separate the expressions. The same reason is applicable for timestamp expressions and functions. ### Does this PR introduce any user-facing change? No ### How was this patch tested? By existing tests from the test suite `DateExpressionsSuite` and `TimestampExpressionSuite`, and by new test suites `TimestampExpressionsSuite` and `TimestampFunctionsSuite`.
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